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Joakim

Joakim Cederkäll

Professor

Joakim

Enhanced Quadrupole and Octupole Strength in Doubly Magic Sn 132

Author

  • D. Rosiak
  • M. Seidlitz
  • P. Reiter
  • H. Naïdja
  • Y. Tsunoda
  • T. Togashi
  • F. Nowacki
  • T. Otsuka
  • G. Colò
  • K. Arnswald
  • T. Berry
  • A. Blazhev
  • M. J.G. Borge
  • J. Cederkäll
  • D. M. Cox
  • H. De Witte
  • L. P. Gaffney
  • C. Henrich
  • R. Hirsch
  • M. Huyse
  • A. Illana
  • K. Johnston
  • L. Kaya
  • Th Kröll
  • M. L.Lozano Benito
  • J. Ojala
  • J. Pakarinen
  • M. Queiser
  • G. Rainovski
  • J. A. Rodriguez
  • B. Siebeck
  • E. Siesling
  • J. Snäll
  • P. Van Duppen
  • A. Vogt
  • M. Von Schmid
  • N. Warr
  • F. Wenander
  • K. O. Zell
Show all

Summary, in English

The first 2+ and 3- states of the doubly magic nucleus Sn132 are populated via safe Coulomb excitation employing the recently commissioned HIE-ISOLDE accelerator at CERN in conjunction with the highly efficient MINIBALL array. The Sn132 ions are accelerated to an energy of 5.49 MeV/nucleon and impinged on a Pb206 target. Deexciting γ rays from the low-lying excited states of the target and the projectile are recorded in coincidence with scattered particles. The reduced transition strengths are determined for the transitions 0g.s.+→21+, 0g.s.+→31-, and 21+→31- in Sn132. The results on these states provide crucial information on cross-shell configurations which are determined within large-scale shell-model and Monte Carlo shell-model calculations as well as from random-phase approximation and relativistic random-phase approximation. The locally enhanced B(E2;0g.s.+→21+) strength is consistent with the microscopic description of the structure of the respective states within all theoretical approaches. The presented results of experiment and theory can be considered to be the first direct verification of the sphericity and double magicity of Sn132.

Department/s

  • Nuclear physics

Publishing year

2018-12-18

Language

English

Publication/Series

Physical Review Letters

Volume

121

Issue

25

Document type

Journal article

Publisher

American Physical Society

Topic

  • Subatomic Physics

Status

Published

ISBN/ISSN/Other

  • ISSN: 0031-9007